As we all know rivers and lakes are the natural habits for fish and other marines. Rivers and lakes have large surface area which makes maximum provision of oxygen for fish survival possible. On the other hand aquarium is not like river or lake, it has a smaller surface area and there is limited movement of habitats.
This makes provision of alternative means of oxygen for fish to breathe important. This artificial process of providing oxygen is called aeration. It's a simple process of re-oxygenating the water in aquarium tank.

The Aerating System:
This is the series of material that increases the supply of air (thereby increasing oxygen concentration) they are:
the air pump
t-pieces
rubber tubing
clamp or regulator
diffusers or airstone
Air pumps come in different shapes and sizes but the most popular ones are tecax air pump from Taiwan together with 'dyna free, and the dragon' another popular one is super 555 from India though cheaper, but not as rugged. Occasionally available are the more expensive whisper and rens air pumps from Uk and rance respectively. Always place air pumps above the water level hooked to a non-vibrating material.
You can accomplish aeration in your aquarium tank by using the above listed aeration materials. This materials form aeration system.

For small tanks all you need is to attach simple aquarium air pump to airstone by means of rubber air tube. The system will be blowing air into the water which cause motion in aquarium tank and thus provide necessary oxygen your fish needs to breathe in aquarium.
If you would like more articles on Aquariums, and Aquarium fish.come visit my new blog:
Fresh Water Aquarium.